Hi folks, I need some suggestions where to look next.
Brief history
Mower worked when first bought but seized after first use. Dismantled and found big end seized. Fixed that. Piston bore looks good no visibly worn parts inside. Lapped valves reassembled. new plug. Non -starting.
Adjusted choke as suggested. Non start. Carburettor replaced. Non start.
If I drop a bit of petrol in inlet manifold it starts easily until petrol used up.
By "non start" I mean does not fire at all after many pulls in any throttle position - completely dead.
Fuel line ok.
Fuel in carburettor bowl.
With carb remove you can feel suction when crank turned.
Spark at plug. Not particularly strong spark but runs with fuel dump.
Engine stop cables/switch disconnected.
Valve clearances checked & re checked.
Some compression. Can't measure but reasonable resistance to turning crank. Thumb over spark plug hole feels pressure.
Next check is to drain fuel completely and put in new fresh shiny petrol.
If the ignition was poor I would expect to hear the occasional misfire when turning.
If it were a carburettor problem I would have expected some difference when it was replaced. All gaskets and spacers look fine and I checked they are in the right places and the right way round.
If anyone has any suggestions where to look next or checks I can do to narrow down the problem it would be greatly appreciated.
I'm all out of ideas and I don't want to start buy lots of replacement parts as the mower has been a bad buy already.
Engine details GXV140 & GJAB-8054370 on crank case. ZG9 on piston head case.
